Vulnerability-Lookup

GHSA-MMHF-MX7H-V77H

Vulnerability from github – Published: 2024-05-19 09:34 – Updated: 2026-05-12 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

net/sched: act_skbmod: prevent kernel-infoleak

syzbot found that tcf_skbmod_dump() was copying four bytes from kernel stack to user space [1].

The issue here is that 'struct tc_skbmod' has a four bytes hole.

We need to clear the structure before filling fields.

[1] BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline] BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:29 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:245 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:271 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_ubuf include/linux/iov_iter.h:29 [inline] iterate_and_advance2 include/linux/iov_iter.h:245 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185 copy_to_iter include/linux/uio.h:196 [inline] simple_copy_to_iter net/core/datagram.c:532 [inline] __skb_datagram_iter+0x185/0x1000 net/core/datagram.c:420 skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546 skb_copy_datagram_msg include/linux/skbuff.h:4050 [inline] netlink_recvmsg+0x432/0x1610 net/netlink/af_netlink.c:1962 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0x2c4/0x340 net/socket.c:1068 __sys_recvfrom+0x35a/0x5f0 net/socket.c:2242 __do_sys_recvfrom net/socket.c:2260 [inline] __se_sys_recvfrom net/socket.c:2256 [inline] __x64_sys_recvfrom+0x126/0x1d0 net/socket.c:2256 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Uninit was stored to memory at: pskb_expand_head+0x30f/0x19d0 net/core/skbuff.c:2253 netlink_trim+0x2c2/0x330 net/netlink/af_netlink.c:1317 netlink_unicast+0x9f/0x1260 net/netlink/af_netlink.c:1351 nlmsg_unicast include/net/netlink.h:1144 [inline] nlmsg_notify+0x21d/0x2f0 net/netlink/af_netlink.c:2610 rtnetlink_send+0x73/0x90 net/core/rtnetlink.c:741 rtnetlink_maybe_send include/linux/rtnetlink.h:17 [inline] tcf_add_notify net/sched/act_api.c:2048 [inline] tcf_action_add net/sched/act_api.c:2071 [inline] tc_ctl_action+0x146e/0x19d0 net/sched/act_api.c:2119 rtnetlink_rcv_msg+0x1737/0x1900 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2559 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6613 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0xf4c/0x1260 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x10df/0x11f0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:745 _syssendmsg+0x877/0xb60 net/socket.c:2584 _sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x307/0x4a0 net/socket.c:2674 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Uninit was stored to memory at: __nla_put lib/nlattr.c:1041 [inline] nla_put+0x1c6/0x230 lib/nlattr.c:1099 tcf_skbmod_dump+0x23f/0xc20 net/sched/act_skbmod.c:256 tcf_action_dump_old net/sched/act_api.c:1191 [inline] tcf_action_dump_1+0x85e/0x970 net/sched/act_api.c:1227 tcf_action_dump+0x1fd/0x460 net/sched/act_api.c:1251 tca_get_fill+0x519/0x7a0 net/sched/act_api.c:1628 tcf_add_notify_msg net/sched/act_api.c:2023 [inline] tcf_add_notify net/sched/act_api.c:2042 [inline] tcf_action_add net/sched/act_api.c:2071 [inline] tc_ctl_action+0x1365/0x19d0 net/sched/act_api.c:2119 rtnetlink_rcv_msg+0x1737/0x1900 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x375/0x650 net/netlink/af_netli ---truncated---

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2024-35893"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-908"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-19T09:15:10Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_skbmod: prevent kernel-infoleak\n\nsyzbot found that tcf_skbmod_dump() was copying four bytes\nfrom kernel stack to user space [1].\n\nThe issue here is that \u0027struct tc_skbmod\u0027 has a four bytes hole.\n\nWe need to clear the structure before filling fields.\n\n[1]\nBUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline]\n BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:29 [inline]\n BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\n BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:271 [inline]\n BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185\n  instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n  copy_to_user_iter lib/iov_iter.c:24 [inline]\n  iterate_ubuf include/linux/iov_iter.h:29 [inline]\n  iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\n  iterate_and_advance include/linux/iov_iter.h:271 [inline]\n  _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185\n  copy_to_iter include/linux/uio.h:196 [inline]\n  simple_copy_to_iter net/core/datagram.c:532 [inline]\n  __skb_datagram_iter+0x185/0x1000 net/core/datagram.c:420\n  skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546\n  skb_copy_datagram_msg include/linux/skbuff.h:4050 [inline]\n  netlink_recvmsg+0x432/0x1610 net/netlink/af_netlink.c:1962\n  sock_recvmsg_nosec net/socket.c:1046 [inline]\n  sock_recvmsg+0x2c4/0x340 net/socket.c:1068\n  __sys_recvfrom+0x35a/0x5f0 net/socket.c:2242\n  __do_sys_recvfrom net/socket.c:2260 [inline]\n  __se_sys_recvfrom net/socket.c:2256 [inline]\n  __x64_sys_recvfrom+0x126/0x1d0 net/socket.c:2256\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nUninit was stored to memory at:\n  pskb_expand_head+0x30f/0x19d0 net/core/skbuff.c:2253\n  netlink_trim+0x2c2/0x330 net/netlink/af_netlink.c:1317\n  netlink_unicast+0x9f/0x1260 net/netlink/af_netlink.c:1351\n  nlmsg_unicast include/net/netlink.h:1144 [inline]\n  nlmsg_notify+0x21d/0x2f0 net/netlink/af_netlink.c:2610\n  rtnetlink_send+0x73/0x90 net/core/rtnetlink.c:741\n  rtnetlink_maybe_send include/linux/rtnetlink.h:17 [inline]\n  tcf_add_notify net/sched/act_api.c:2048 [inline]\n  tcf_action_add net/sched/act_api.c:2071 [inline]\n  tc_ctl_action+0x146e/0x19d0 net/sched/act_api.c:2119\n  rtnetlink_rcv_msg+0x1737/0x1900 net/core/rtnetlink.c:6595\n  netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2559\n  rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6613\n  netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]\n  netlink_unicast+0xf4c/0x1260 net/netlink/af_netlink.c:1361\n  netlink_sendmsg+0x10df/0x11f0 net/netlink/af_netlink.c:1905\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg+0x30f/0x380 net/socket.c:745\n  ____sys_sendmsg+0x877/0xb60 net/socket.c:2584\n  ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\n  __sys_sendmsg net/socket.c:2667 [inline]\n  __do_sys_sendmsg net/socket.c:2676 [inline]\n  __se_sys_sendmsg net/socket.c:2674 [inline]\n  __x64_sys_sendmsg+0x307/0x4a0 net/socket.c:2674\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nUninit was stored to memory at:\n  __nla_put lib/nlattr.c:1041 [inline]\n  nla_put+0x1c6/0x230 lib/nlattr.c:1099\n  tcf_skbmod_dump+0x23f/0xc20 net/sched/act_skbmod.c:256\n  tcf_action_dump_old net/sched/act_api.c:1191 [inline]\n  tcf_action_dump_1+0x85e/0x970 net/sched/act_api.c:1227\n  tcf_action_dump+0x1fd/0x460 net/sched/act_api.c:1251\n  tca_get_fill+0x519/0x7a0 net/sched/act_api.c:1628\n  tcf_add_notify_msg net/sched/act_api.c:2023 [inline]\n  tcf_add_notify net/sched/act_api.c:2042 [inline]\n  tcf_action_add net/sched/act_api.c:2071 [inline]\n  tc_ctl_action+0x1365/0x19d0 net/sched/act_api.c:2119\n  rtnetlink_rcv_msg+0x1737/0x1900 net/core/rtnetlink.c:6595\n  netlink_rcv_skb+0x375/0x650 net/netlink/af_netli\n---truncated---",
  "id": "GHSA-mmhf-mx7h-v77h",
  "modified": "2026-05-12T12:31:48Z",
  "published": "2024-05-19T09:34:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35893"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55d3fe7b2b7bc354e7cbc1f7b8f98a29ccd5a366"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e45dc4408857305f4685abfd7a528a1e58b51b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/729ad2ac2a2cdc9f4a4bdfd40bfd276e6bc33924"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7bb2c7103d8c13b06a57bf997b8cdbe93cd7283c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a097fc199ab5f4b5392c5144034c0d2148b55a14"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d313eb8b77557a6d5855f42d2234bd592c7b50dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f190a4aa03cbd518bd9c62a66e1233984f5fd2ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f356eb2fb567e0931143ac1769ac802d3b3e2077"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-35893 (GCVE-0-2024-35893)

Vulnerability from cvelistv5 – Published: 2024-05-19 08:34 – Updated: 2026-05-12 11:52

Title

net/sched: act_skbmod: prevent kernel-infoleak

Summary

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_skbmod: prevent kernel-infoleak syzbot found that tcf_skbmod_dump() was copying four bytes from kernel stack to user space [1]. The issue here is that 'struct tc_skbmod' has a four bytes hole. We need to clear the structure before filling fields. [1] BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline] BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:29 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:245 [inline] BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:271 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_ubuf include/linux/iov_iter.h:29 [inline] iterate_and_advance2 include/linux/iov_iter.h:245 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185 copy_to_iter include/linux/uio.h:196 [inline] simple_copy_to_iter net/core/datagram.c:532 [inline] __skb_datagram_iter+0x185/0x1000 net/core/datagram.c:420 skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546 skb_copy_datagram_msg include/linux/skbuff.h:4050 [inline] netlink_recvmsg+0x432/0x1610 net/netlink/af_netlink.c:1962 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0x2c4/0x340 net/socket.c:1068 __sys_recvfrom+0x35a/0x5f0 net/socket.c:2242 __do_sys_recvfrom net/socket.c:2260 [inline] __se_sys_recvfrom net/socket.c:2256 [inline] __x64_sys_recvfrom+0x126/0x1d0 net/socket.c:2256 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Uninit was stored to memory at: pskb_expand_head+0x30f/0x19d0 net/core/skbuff.c:2253 netlink_trim+0x2c2/0x330 net/netlink/af_netlink.c:1317 netlink_unicast+0x9f/0x1260 net/netlink/af_netlink.c:1351 nlmsg_unicast include/net/netlink.h:1144 [inline] nlmsg_notify+0x21d/0x2f0 net/netlink/af_netlink.c:2610 rtnetlink_send+0x73/0x90 net/core/rtnetlink.c:741 rtnetlink_maybe_send include/linux/rtnetlink.h:17 [inline] tcf_add_notify net/sched/act_api.c:2048 [inline] tcf_action_add net/sched/act_api.c:2071 [inline] tc_ctl_action+0x146e/0x19d0 net/sched/act_api.c:2119 rtnetlink_rcv_msg+0x1737/0x1900 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2559 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6613 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0xf4c/0x1260 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x10df/0x11f0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:745 ____sys_sendmsg+0x877/0xb60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x307/0x4a0 net/socket.c:2674 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Uninit was stored to memory at: __nla_put lib/nlattr.c:1041 [inline] nla_put+0x1c6/0x230 lib/nlattr.c:1099 tcf_skbmod_dump+0x23f/0xc20 net/sched/act_skbmod.c:256 tcf_action_dump_old net/sched/act_api.c:1191 [inline] tcf_action_dump_1+0x85e/0x970 net/sched/act_api.c:1227 tcf_action_dump+0x1fd/0x460 net/sched/act_api.c:1251 tca_get_fill+0x519/0x7a0 net/sched/act_api.c:1628 tcf_add_notify_msg net/sched/act_api.c:2023 [inline] tcf_add_notify net/sched/act_api.c:2042 [inline] tcf_action_add net/sched/act_api.c:2071 [inline] tc_ctl_action+0x1365/0x19d0 net/sched/act_api.c:2119 rtnetlink_rcv_msg+0x1737/0x1900 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x375/0x650 net/netlink/af_netli ---truncated---

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-05-23 19:31 UTC

Assigner

Linux mitre root

References

11 references

URL	Tags
https://git.kernel.org/stable/c/f190a4aa03cbd518b…
https://git.kernel.org/stable/c/f356eb2fb567e0931…
https://git.kernel.org/stable/c/5e45dc4408857305f…
https://git.kernel.org/stable/c/a097fc199ab5f4b53…
https://git.kernel.org/stable/c/55d3fe7b2b7bc354e…
https://git.kernel.org/stable/c/729ad2ac2a2cdc9f4…
https://git.kernel.org/stable/c/7bb2c7103d8c13b06…
https://git.kernel.org/stable/c/d313eb8b77557a6d5…
https://lists.debian.org/debian-lts-announce/2024…	x_transferred
https://lists.debian.org/debian-lts-announce/2024…	x_transferred
https://cert-portal.siemens.com/productcert/html/…

Impacted products

3 products

Vendor	Product	Version
Linux	Linux	Affected: 86da71b57383d40993cb90baafb3735cffe5d800 , < f190a4aa03cbd518bd9c62a66e1233984f5fd2ec (git) Affected: 86da71b57383d40993cb90baafb3735cffe5d800 , < f356eb2fb567e0931143ac1769ac802d3b3e2077 (git) Affected: 86da71b57383d40993cb90baafb3735cffe5d800 , < 5e45dc4408857305f4685abfd7a528a1e58b51b5 (git) Affected: 86da71b57383d40993cb90baafb3735cffe5d800 , < a097fc199ab5f4b5392c5144034c0d2148b55a14 (git) Affected: 86da71b57383d40993cb90baafb3735cffe5d800 , < 55d3fe7b2b7bc354e7cbc1f7b8f98a29ccd5a366 (git) Affected: 86da71b57383d40993cb90baafb3735cffe5d800 , < 729ad2ac2a2cdc9f4a4bdfd40bfd276e6bc33924 (git) Affected: 86da71b57383d40993cb90baafb3735cffe5d800 , < 7bb2c7103d8c13b06a57bf997b8cdbe93cd7283c (git) Affected: 86da71b57383d40993cb90baafb3735cffe5d800 , < d313eb8b77557a6d5855f42d2234bd592c7b50dd (git)
Linux	Linux	Affected: 4.9 Unaffected: 0 , < 4.9 (semver) Unaffected: 4.19.312 , ≤ 4.19.* (semver) Unaffected: 5.4.274 , ≤ 5.4.* (semver) Unaffected: 5.10.215 , ≤ 5.10.* (semver) Unaffected: 5.15.154 , ≤ 5.15.* (semver) Unaffected: 6.1.85 , ≤ 6.1.* (semver) Unaffected: 6.6.26 , ≤ 6.6.* (semver) Unaffected: 6.8.5 , ≤ 6.8.* (semver) Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	Affected: 0 , < * (custom)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2024-35893",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2024-05-23T19:31:02.298124Z",
                "version": "2.0.3"
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              "type": "ssvc"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T03:21:48.968Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://git.kernel.org/stable/c/f356eb2fb567e0931143ac1769ac802d3b3e2077"
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            "url": "https://git.kernel.org/stable/c/5e45dc4408857305f4685abfd7a528a1e58b51b5"
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              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/a097fc199ab5f4b5392c5144034c0d2148b55a14"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/55d3fe7b2b7bc354e7cbc1f7b8f98a29ccd5a366"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/729ad2ac2a2cdc9f4a4bdfd40bfd276e6bc33924"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/7bb2c7103d8c13b06a57bf997b8cdbe93cd7283c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/d313eb8b77557a6d5855f42d2234bd592c7b50dd"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-12T11:52:28.473Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sched/act_skbmod.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f190a4aa03cbd518bd9c62a66e1233984f5fd2ec",
              "status": "affected",
              "version": "86da71b57383d40993cb90baafb3735cffe5d800",
              "versionType": "git"
            },
            {
              "lessThan": "f356eb2fb567e0931143ac1769ac802d3b3e2077",
              "status": "affected",
              "version": "86da71b57383d40993cb90baafb3735cffe5d800",
              "versionType": "git"
            },
            {
              "lessThan": "5e45dc4408857305f4685abfd7a528a1e58b51b5",
              "status": "affected",
              "version": "86da71b57383d40993cb90baafb3735cffe5d800",
              "versionType": "git"
            },
            {
              "lessThan": "a097fc199ab5f4b5392c5144034c0d2148b55a14",
              "status": "affected",
              "version": "86da71b57383d40993cb90baafb3735cffe5d800",
              "versionType": "git"
            },
            {
              "lessThan": "55d3fe7b2b7bc354e7cbc1f7b8f98a29ccd5a366",
              "status": "affected",
              "version": "86da71b57383d40993cb90baafb3735cffe5d800",
              "versionType": "git"
            },
            {
              "lessThan": "729ad2ac2a2cdc9f4a4bdfd40bfd276e6bc33924",
              "status": "affected",
              "version": "86da71b57383d40993cb90baafb3735cffe5d800",
              "versionType": "git"
            },
            {
              "lessThan": "7bb2c7103d8c13b06a57bf997b8cdbe93cd7283c",
              "status": "affected",
              "version": "86da71b57383d40993cb90baafb3735cffe5d800",
              "versionType": "git"
            },
            {
              "lessThan": "d313eb8b77557a6d5855f42d2234bd592c7b50dd",
              "status": "affected",
              "version": "86da71b57383d40993cb90baafb3735cffe5d800",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sched/act_skbmod.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.9"
            },
            {
              "lessThan": "4.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.312",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.274",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.215",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.85",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.26",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.312",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.274",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.215",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.154",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.85",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.26",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.5",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_skbmod: prevent kernel-infoleak\n\nsyzbot found that tcf_skbmod_dump() was copying four bytes\nfrom kernel stack to user space [1].\n\nThe issue here is that \u0027struct tc_skbmod\u0027 has a four bytes hole.\n\nWe need to clear the structure before filling fields.\n\n[1]\nBUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline]\n BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:29 [inline]\n BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\n BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:271 [inline]\n BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185\n  instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n  copy_to_user_iter lib/iov_iter.c:24 [inline]\n  iterate_ubuf include/linux/iov_iter.h:29 [inline]\n  iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\n  iterate_and_advance include/linux/iov_iter.h:271 [inline]\n  _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185\n  copy_to_iter include/linux/uio.h:196 [inline]\n  simple_copy_to_iter net/core/datagram.c:532 [inline]\n  __skb_datagram_iter+0x185/0x1000 net/core/datagram.c:420\n  skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546\n  skb_copy_datagram_msg include/linux/skbuff.h:4050 [inline]\n  netlink_recvmsg+0x432/0x1610 net/netlink/af_netlink.c:1962\n  sock_recvmsg_nosec net/socket.c:1046 [inline]\n  sock_recvmsg+0x2c4/0x340 net/socket.c:1068\n  __sys_recvfrom+0x35a/0x5f0 net/socket.c:2242\n  __do_sys_recvfrom net/socket.c:2260 [inline]\n  __se_sys_recvfrom net/socket.c:2256 [inline]\n  __x64_sys_recvfrom+0x126/0x1d0 net/socket.c:2256\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nUninit was stored to memory at:\n  pskb_expand_head+0x30f/0x19d0 net/core/skbuff.c:2253\n  netlink_trim+0x2c2/0x330 net/netlink/af_netlink.c:1317\n  netlink_unicast+0x9f/0x1260 net/netlink/af_netlink.c:1351\n  nlmsg_unicast include/net/netlink.h:1144 [inline]\n  nlmsg_notify+0x21d/0x2f0 net/netlink/af_netlink.c:2610\n  rtnetlink_send+0x73/0x90 net/core/rtnetlink.c:741\n  rtnetlink_maybe_send include/linux/rtnetlink.h:17 [inline]\n  tcf_add_notify net/sched/act_api.c:2048 [inline]\n  tcf_action_add net/sched/act_api.c:2071 [inline]\n  tc_ctl_action+0x146e/0x19d0 net/sched/act_api.c:2119\n  rtnetlink_rcv_msg+0x1737/0x1900 net/core/rtnetlink.c:6595\n  netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2559\n  rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6613\n  netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]\n  netlink_unicast+0xf4c/0x1260 net/netlink/af_netlink.c:1361\n  netlink_sendmsg+0x10df/0x11f0 net/netlink/af_netlink.c:1905\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg+0x30f/0x380 net/socket.c:745\n  ____sys_sendmsg+0x877/0xb60 net/socket.c:2584\n  ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\n  __sys_sendmsg net/socket.c:2667 [inline]\n  __do_sys_sendmsg net/socket.c:2676 [inline]\n  __se_sys_sendmsg net/socket.c:2674 [inline]\n  __x64_sys_sendmsg+0x307/0x4a0 net/socket.c:2674\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nUninit was stored to memory at:\n  __nla_put lib/nlattr.c:1041 [inline]\n  nla_put+0x1c6/0x230 lib/nlattr.c:1099\n  tcf_skbmod_dump+0x23f/0xc20 net/sched/act_skbmod.c:256\n  tcf_action_dump_old net/sched/act_api.c:1191 [inline]\n  tcf_action_dump_1+0x85e/0x970 net/sched/act_api.c:1227\n  tcf_action_dump+0x1fd/0x460 net/sched/act_api.c:1251\n  tca_get_fill+0x519/0x7a0 net/sched/act_api.c:1628\n  tcf_add_notify_msg net/sched/act_api.c:2023 [inline]\n  tcf_add_notify net/sched/act_api.c:2042 [inline]\n  tcf_action_add net/sched/act_api.c:2071 [inline]\n  tc_ctl_action+0x1365/0x19d0 net/sched/act_api.c:2119\n  rtnetlink_rcv_msg+0x1737/0x1900 net/core/rtnetlink.c:6595\n  netlink_rcv_skb+0x375/0x650 net/netlink/af_netli\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:13:17.005Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f190a4aa03cbd518bd9c62a66e1233984f5fd2ec"
        },
        {
          "url": "https://git.kernel.org/stable/c/f356eb2fb567e0931143ac1769ac802d3b3e2077"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e45dc4408857305f4685abfd7a528a1e58b51b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/a097fc199ab5f4b5392c5144034c0d2148b55a14"
        },
        {
          "url": "https://git.kernel.org/stable/c/55d3fe7b2b7bc354e7cbc1f7b8f98a29ccd5a366"
        },
        {
          "url": "https://git.kernel.org/stable/c/729ad2ac2a2cdc9f4a4bdfd40bfd276e6bc33924"
        },
        {
          "url": "https://git.kernel.org/stable/c/7bb2c7103d8c13b06a57bf997b8cdbe93cd7283c"
        },
        {
          "url": "https://git.kernel.org/stable/c/d313eb8b77557a6d5855f42d2234bd592c7b50dd"
        }
      ],
      "title": "net/sched: act_skbmod: prevent kernel-infoleak",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-35893",
    "datePublished": "2024-05-19T08:34:48.737Z",
    "dateReserved": "2024-05-17T13:50:33.113Z",
    "dateUpdated": "2026-05-12T11:52:28.473Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.